JP2009057071A - Self-standing bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-standing bag capable of pouring a liquid content without closing a spout part when the liquid content is re-filled into another container or the like, pouring easily it by one hand, and being self-standable. <P>SOLUTION: The self-standing bag is prepared by arranging two sheets of body part forming sheets each consisting of a paper substrate laminated sheet which keeps at least a paper substrate and the innermost layer overlaid with a heat-adhesive resin layer so as to oppose the heat-adhesive resin layer faces, inserting a bottom part forming sheet consisting of a laminated sheet equipped with at least a heat-adhesive resin layer as the innermost layer into the lower end part between the body part forming sheets so as to make the innermost layer face outside and make it into ridge-folding at the center, and heat-sticking the peripheral edges. The spout part whose peripheral edges are heat-stuck and tip is cut to pour the content is provided at the upper part of the two sheets of the body part forming sheet. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a self-supporting packaging bag used for hermetically wrapping contents such as a liquid detergent for refilling, and more specifically, has a spout portion that is self-supporting and easy to pour the contents after opening. Related to freestanding bags.

  Conventionally, as a packaging container for storing liquid contents such as liquid detergents, kitchen detergents, softeners, and other liquid contents such as sauces, soy sauce, dressings, juices, etc. Is widely used. On the other hand, in order to save resources and reduce the amount of waste due to the growing concern about environmental issues related to the increase in waste, the periphery of the sheet is thermally bonded using a plastic film laminated sheet, and liquid detergent and kitchen detergent. , A container for storing toiletries such as softeners, and provided with a spout portion protruding outward at the top of the container, and in use, the protruding spout portion is cut with scissors or the like, For example, self-supporting bags are widely used as refill containers with a spout that can be easily poured into a plastic bottle with a cap and refilled.

  Such a self-supporting bag with a spout is required to be able to smoothly and easily pour the contents, and to pour out the contents so that there is little remaining while maintaining a stable flow until the end. Sealing the periphery of a piece of synthetic resin film, providing a protruding spout part at a part of the periphery, and refilling a plastic pipe embedded between the two synthetic resin films constituting the extraction part There is disclosed a bag having a reinforcing mechanism in which a spout is provided at a corner of a liquid storage container or a synthetic resin film bag and a convex linear emboss is provided on the outside (for example, Patent Document 1, 2).

  However, the refilling liquid storage container disclosed in Patent Document 1 has a plastic pipe-like member attached to the spout, so that a process for manufacturing and attaching the member is required, resulting in an increase in cost. In addition, in order to set up the film material and the pipe member of the spout part, there is a problem that it takes time to manage the stock so that the quantity of materials and members does not become excessive or insufficient.

  In addition, the bag disclosed in Patent Document 2 has no labor for inventory management due to the absence of the molding member, and the member cost has been improved. However, it is necessary to perform embossing to form a reinforcing mechanism. There is a problem that a die for processing is necessary and the cost is high. Furthermore, the inventions disclosed in Patent Documents 1 and 2 do not have shape retention in the bag material itself, and when refilling a container such as a bottle, it is necessary to hold the bag with both hands and support the container such as a bottle. There was a problem that the bottles were knocked down.

To solve these problems, it consists of a bag-shaped body and a spout provided so as to protrude outwardly from the top of the body, and the body is a paperboard or a synthetic material with rigidity. One side wall forming sheet in which a thermal adhesive resin layer is laminated on one side of a base sheet made of a resin sheet, and the other side wall forming sheet having a thermal adhesive resin layer on one side, the thermal adhesive resin layer is on the inner side. The spout forming pieces are formed so as to be opposed to each other, and are formed by thermally bonding the peripheral portions facing each other, and the spout is formed so as to protrude outward at the upper part of each side wall forming sheet. A self-supporting packaging bag is disclosed that is formed by superimposing each other and thermally bonding these peripheral portions (see, for example, Patent Document 3). The technique disclosed in Patent Document 3 eliminates the need for a molding member and eliminates the need for embossing, thereby eliminating the high cost and complexity of management. However, one side wall forming sheet and the other side wall forming Since the materials of the sheets are different, there is a problem that if the tension is applied to each side wall forming sheet, a difference in elongation occurs, and it is difficult to register each side wall forming sheet in the bag making process. Moreover, although self-supporting property can be obtained, the other side wall forming sheet is not rigid, so that there is a problem that wrinkles are generated in the body portion and the design property is inferior. In addition, because the shape of the side wall forming sheet is not sufficient, the spout may be bent, and the spout closes around the bent spout during pouring, and the contents cannot be poured out. There's a problem. Further, when the inner volume decreases, sufficient rigidity cannot be obtained with the rigidity of one of the side wall forming sheets, and it is necessary to pour it with both hands so that the side wall forming sheet does not deform.
Japanese Patent Laid-Open No. 9-240692 JP 7-2260 A JP 11-310248 A

  Therefore, the present invention has been made to solve the above problem, and can be poured without clogging the spout when the liquid contents are refilled into another container or the like, and can be easily poured with one hand. It is to provide a free-standing bag that can be self-supporting.

  In order to achieve the above-mentioned object, the present invention according to claim 1 is characterized in that two bodies are formed of a paper base material laminated sheet in which a heat adhesive resin layer is laminated at least on a paper base material and an innermost layer. The bottom-forming sheet, which is a laminated sheet having at least the thermo-adhesive resin layer as the innermost layer at the lower end between the body-forming sheets, is disposed on the innermost side. It is a self-supporting bag formed by folding a mountain at the center with the layer surface as the outer surface, and thermally bonding the periphery, and the periphery is thermally bonded to the upper part of the two body forming sheets, and the tip is cut off. It is a self-supporting bag characterized by having a spout part for pouring out objects.

  Further, according to a second aspect of the present invention, in the self-supporting bag according to the first aspect, an assembly ruled line is provided on the two body portion forming sheets of the spout portion. .

  Further, in the present invention described in claim 3, in the self-standing bag according to claim 1 or 2, the spout portion is provided at an upper corner portion composed of a side side and an upper side of the body portion forming sheet. It is characterized by.

  The self-supporting bag of the present invention is such that at least the paper base and the thermal adhesive resin layer surface of the two body forming sheets made of the paper base laminate sheet in which the thermal adhesive resin layer is laminated on the innermost layer are opposed to each other. Place the bottom forming sheet, which is a laminated sheet having at least the heat-adhesive resin layer in the innermost layer at the lower end between the body forming sheets, and fold it in the center with the innermost layer surface as the outer surface. When the contents are filled, the bottom forming sheet spreads to form a three-dimensional shape and becomes a self-supporting self-supporting bag having a stable bottom. Further, by forming the spout portion with a paper base material laminated sheet, shape retention can be obtained, and pouring can be performed without blocking the spout portion. In addition, by using a paper base laminate sheet for the two body forming sheets, excellent shape retention is obtained due to the rigidity of the paper base, and a self-supporting bag when refilling the contents in a container such as a bottle Can be held with one hand and a container such as a bottle can be supported with the other hand, so the contents can be refilled safely. Furthermore, wrinkles are not generated in the body portion or the like due to the rigidity of the paper base material, and a high-design self-supporting bag having an excellent appearance can be obtained.

  In the self-supporting bag according to claim 2, the spout portion is easily three-dimensionalized by providing an assembling ruled line to the spout portion, and the contents can be poured smoothly without being blocked.

  The self-supporting bag according to claim 3 is capable of pouring the contents to the end by providing the spout portion at the upper corner formed by the side and the top of the body forming sheet. There is an effect that the remaining amount can be reduced.

The above-described present invention will be described below with reference to the drawings.
1 is a front view showing an embodiment of a self-supporting bag according to the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 3 is a perspective view for explaining the self-supporting bag according to the present invention. 4 shows a cross-sectional view taken along the line BB in FIG. 3. In FIG. 4, reference numeral 1 denotes a self-supporting bag, 2 denotes an upper edge thermal adhesive portion, 3 denotes a side edge thermal adhesive portion, 4 denotes a spout portion, and 5 denotes an outlet portion. Spout outlet thermal bonding part, 6 is an assembly ruled line, 7 is a bottom part, 8 is a bottom part thermal bonding part, 9 is a spout, 10 is a body forming sheet, 11 and 21 are thermal adhesive resin layers, and 12 and 22 are The intermediate layer, 13 paper base material, 20 is a bottom forming sheet, 20a is notched, and 23 is a base material layer.

  FIG. 1 is a front view showing an embodiment of a self-supporting bag according to the present invention, and FIG. 2 is a cross-sectional view taken along the line AA of FIG. As shown in FIGS. 1 and 2, the self-supporting bag 1 of the present invention includes two body part forming sheets composed of a paper base material laminated sheet in which a heat adhesive resin layer is laminated at least on a paper base material and an innermost layer. The bottom-forming sheet 20 made of a laminated sheet having at least the thermo-adhesive resin layer as the innermost layer at the lower end between the body-forming sheets 10 is disposed on the innermost side. The layer surface is the outer surface, and a mountain fold is inserted at the center, and the periphery is thermally bonded. The self-supporting bag 1 is a spout serving as a spout for pouring out the contents protruding outward to the upper corner portion composed of the side edge thermal bonding portion 3 (side) and the upper edge thermal bonding portion 2 (upper side). A portion 4 is provided, and the outer edge of the spout portion 4 is thermally bonded by the spout thermal bonding portion 5. Further, an assembling ruled line 6 is provided in the pouring port portion 4 in the pouring axis direction. The position of the spout 4 is not particularly limited as long as it is the upper part of the two body forming sheets 10 and 10, but the side edges (side edges) of the two body forming sheets 10 and 10 are not limited. It is possible to pour out the contents to the end and to reduce the remaining amount in the self-supporting bag 1 by providing it at the upper corner composed of the thermal bonding part 3) and the upper side (upper edge thermal bonding part 2). Therefore, it is preferable. In addition, the upper part of the sheet | seat for two trunk | drum formations which provides the spout part 4 said by this invention is an upper side (upper edge thermal bonding part 2) and an upper side (side edge thermal bonding part 3) from the upper side to a side edge It includes a portion about 1/3 of the length of.

  The bottom portion 7 formed by inserting the bottom portion forming sheet 20 into the lower end portion between the body portion forming sheets 10 with the innermost layer surface being the outer surface and being folded in the center is the heat of the body portion forming sheet 10. The adhesive resin layer surface and the thermal adhesive resin layer surface of the bottom forming sheet 20 are opposed to each other, and the periphery is thermally bonded by the bottom thermal adhesive portion 8 having a ship bottom shape. Further, notches 20a and 20a are provided on both side edges of the bottom forming sheet 20 inserted by folding the mountain, and the left and right side end portions of the lower ends of the body forming sheets 10 and 10 are notched 20a and 20a. Are bonded to each other. The shape of the bottom heat bonding portion 8 is not limited to the ship bottom shape, and can be arbitrarily provided depending on the strength as a self-supporting bag, the ease of opening the bottom portion, and the like. Moreover, it is preferable to provide the notch 20a when one surface has no thermal adhesiveness due to the configuration of the laminated sheet of the bottom forming sheet 20.

As shown in FIG. 2, the two body forming sheets 10 are formed of a paper base laminate sheet in which a heat adhesive resin layer 11, an intermediate layer 12, and a paper base 13 are sequentially laminated on the innermost layer. . As the paper base 13, a paperboard having a basis weight of 80 to 500 g / m ² is used. On the intermediate layer 12, a synthetic resin film made of stretched polypropylene (OPP), stretched nylon (ON), polyethylene terephthalate (PET) or the like, and a metal such as aluminum or an inorganic material such as aluminum oxide or silicon oxide was deposited on these films. A gas barrier material such as a gas barrier film and an aluminum foil, or a laminate of these films and gas barrier materials can be used. Examples of the heat-adhesive resin layer 11 include polypropylene, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer, and ethylene / acrylic acid ester. Copolymers, ionomers and the like are used. Further, a surface layer may be laminated on the paper substrate 13. For the surface layer, the same synthetic resin film, gas barrier film, and gas barrier material as the intermediate layer 12 can be used. As a lamination method, a known dry lamination method, extrusion method, wet lamination method, or the like can be used.

  As shown in FIG. 2, the bottom forming sheet 20 is composed of a laminated sheet in which a thermoadhesive resin layer 21, an intermediate layer 22, and a base material layer 23 are sequentially laminated on the innermost layer. On the base material layer 23, a synthetic resin film made of stretched polypropylene (OPP), stretched nylon (ON), polyethylene terephthalate (PET) or the like, and a metal such as aluminum or an inorganic material such as aluminum oxide or silicon oxide is deposited on these films. A gas barrier film is used. The intermediate layer 22 may be a film used for the base material layer 23, a gas barrier material such as an aluminum foil, or a laminate of these films and gas barrier materials. For the heat-adhesive resin layer 21, polypropylene, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ethylene / acrylic acid ester Copolymers, ionomers and the like are used. These can be appropriately selected and laminated according to the physical properties required by the contents to be filled. As a lamination method, a known dry lamination method, extrusion method, wet lamination method, or the like can be used. In addition, the laminated sheet constituting the bottom forming sheet 20 only needs to have at least the heat-adhesive resin layer 21 in the innermost layer, and the base material layer 23 or the intermediate layer 22 is made of paper, non-woven fabric in addition to the above film and gas barrier material. Synthetic paper or the like can also be used.

Moreover, since the paper base material laminated sheet constituting the body forming sheet 10 uses a paperboard having a basis weight of 80 to 500 g / m ² , the total weight of the self-supporting bag 1 (two body forming sheets) 10, the body forming sheet 10 and the bottom forming sheet 20 constituting the self-supporting bag 1 so that the weight of the paper base material is 50% or more with respect to the total weight of the bottom forming sheet 20). You can design the configuration. As a result, the self-supporting bag 1 is classified as a paper container, which is a specific container of the Containers and Packaging Recycling Law. It has the effect of being about half.

Next, a method of using the self-supporting bag 1 will be described with reference to FIGS. First, for example, a predetermined amount of liquid detergent is filled using the upper edge thermal adhesive portion 2 before thermal bonding as a filling port, and then the upper edge thermal adhesive portion 2 is thermally bonded and hermetically packaged. When filled with the liquid detergent, as shown in FIG. 2, the bottom forming sheet 20 folded in an inverted M-shaped cross section is spread by the weight of the liquid detergent and becomes self-supporting as shown in FIG. The self-supporting bag 1 filled with the contents and sealed and packaged is displayed in a stand-alone manner at a store. A consumer who has purchased the self-supporting bag 1 cuts and opens the tip of the spout portion 4 with scissors or the like, and sandwiches and pushes the spout thermal adhesive portions 5 on both sides of the spout portion 4 with his / her fingers. 6, the trunk portion forming sheet 10 of the spout portion 4 is bent outward to form a rectangular spout 9 as shown in FIG. 4. Since the paper base material is laminated, the spout 9 has a shape-retaining property. Hold the free-standing bag 1 with one hand and hold the refill bottle with the other hand. The tip is inserted into the refill bottle inlet, and the freestanding bag 1 is lifted so as to be tilted, and the contents are poured into the refill bottle. In this way, rigidity is obtained in the body portion by laminating a paperboard having a basis weight of 80 to 500 g / m ² on the body portion forming sheet 10, and the freestanding bag 1 is deformed by the weight of the liquid detergent. The contents can be safely refilled with one hand.

  Next, the present invention will be described in more detail with reference to the following examples.

Biaxially stretched polyethylene terephthalate film (PET) with a thickness of 12 μm on the surface layer, thick paper with a basis weight of 157 g / m ^{2 on} the paper base, and 12 μm thick aluminum-deposited PET (VMPET) on the intermediate layer and biaxial with a thickness of 15 μm Gravure printing (GR) using stretched nylon film (ON), linear low density polyethylene (LLDPE) with a thickness of 100 μm for the heat-adhesive resin layer, and urethane-based ink on one side of the PET on the surface layer. Each paper film is laminated by a dry lamination method (DL) using a urethane-based adhesive, and is a paper base having a structure of PET 12 μ / GR / DL / cardboard 157 g / m ² / DL / VMPET 12 μm / DL / ON 15 μm / DL / LLDPE 100 μm A laminated sheet was produced.

  Next, urethane base ink is used on the corona discharge treatment surface of ON using 15 μm thick ON as the base material layer, 12 μm thick VMPET as the intermediate layer, and 130 μm thick LLDPE as the thermal adhesive resin layer. Gravure printing (GR) was performed, and lamination was performed by dry lamination (DL) using a urethane-based adhesive, thereby producing a plastic film laminated sheet having a configuration of ON 15 μm / GR / DL / VMPET 12 μm / DL / LLDPE 130 μm.

  The paper base laminate sheet is used for the body forming sheet, and the plastic film laminate sheet is used for the bottom forming sheet, and then the bag is made by a general stand pack bag making machine, and the height is 200 mm, the width is 150 mm, and the bottom gusset. A self-supporting bag 1 having a size (folding width) of 30 mm and a spout portion provided in the upper corner was prepared, and 500 ml of a commercial liquid detergent was filled and sealed. As for the ruled line for assembling the spout part, a device equipped with a wooden mold equipped with a ruled blade for assembling of a predetermined shape is installed in a stand pack bag making machine, and a ruled line is formed as a ruled line from a PET surface in a predetermined position. gave.

It is a front view which shows one Embodiment of the self-supporting bag concerning this invention. It is the sectional view on the AA line of FIG. It is a perspective view for demonstrating the self-supporting bag concerning this invention. FIG. 4 is a sectional view taken along line BB in FIG. 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Self-supporting bag 2 Upper edge thermal bonding part 3 Side edge thermal bonding part 4 Outlet part 5 Outlet thermal adhesive part 6 Assembly ruled line 7 Bottom part 8 Bottom thermal adhesive part 9 Outlet part 10 Body forming sheet 11, 21 Thermal adhesive resin layer 12, 22 Intermediate layer 13 Paper base material 20 Bottom forming sheet 20a Notch 23 Base material layer

Claims (3)

At least the heat-adhesive resin layer surfaces of two paper-body forming sheets made of a paper-base laminate sheet in which a heat-adhesive resin layer is laminated on at least the paper base material and the innermost layer are arranged to face each other, A bottom forming sheet consisting of a laminated sheet having at least a heat-adhesive resin layer at the innermost layer at the lower end between the sheets is inserted by folding in the center with the innermost layer surface as the outer surface, and the periphery is thermally bonded. A self-supporting bag, comprising a spout portion that has a peripheral edge thermally bonded to the upper part of the two body forming sheets, the tip being cut off, and the contents being poured out. 2. The self-supporting bag according to claim 1, wherein an assembly ruled line is provided on the two body forming sheets of the spout portion. The self-supporting bag according to claim 1 or 2, wherein the spout portion is provided at an upper corner portion formed by a side and an upper side of the body portion forming sheet.

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